DE3431376A1 - Gas-insulated switching installation having a device for testing the density of the insulating gas - Google Patents
Gas-insulated switching installation having a device for testing the density of the insulating gasInfo
- Publication number
- DE3431376A1 DE3431376A1 DE19843431376 DE3431376A DE3431376A1 DE 3431376 A1 DE3431376 A1 DE 3431376A1 DE 19843431376 DE19843431376 DE 19843431376 DE 3431376 A DE3431376 A DE 3431376A DE 3431376 A1 DE3431376 A1 DE 3431376A1
- Authority
- DE
- Germany
- Prior art keywords
- switchgear
- gas
- temperature
- dependent resistor
- insulating gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims description 4
- 238000009434 installation Methods 0.000 title abstract 2
- 230000001419 dependent effect Effects 0.000 claims abstract description 10
- 238000005538 encapsulation Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/055—Features relating to the gas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
- H01H33/56—Gas reservoirs
- H01H33/563—Gas reservoirs comprising means for monitoring the density of the insulating gas
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
Description
Gasisolierte Schaltanlage mit einer Einrichtung zur Prüfung der IsoliergasdichteGas-insulated switchgear with a device for testing the insulating gas density
Die vorliegende Erfindung betrifft eine Schaltanlage nach dem Oberbegriff des Patentanspruches 1.The present invention relates to a switchgear assembly according to the preamble of claim 1.
Es ist bereits eine Einrichtung zur Erfassung der Dichte von Isoliergas, z. B. SFfi (Schwefelhexafluorid) in Form einer Gaswaage bekannt (DE - OS 2827 4o6). Diese Gaswaage ist jedoch raumaufwendig und relativ kostspielig in der Herstellung, da die Lagerung der nach dem Prinzip der Balkenwaage funktionierende Gaswaage eine äußerst präzise und daher zeitaufwendige Fertigung erfordert.There is already a device for detecting the density of insulating gas, e.g. B. SF fi (sulfur hexafluoride) in the form of a gas balance known (DE - OS 2827 4o6). However, this gas balance is space-consuming and relatively expensive to manufacture, since the storage of the gas balance, which functions on the principle of the beam balance, requires extremely precise and therefore time-consuming manufacture.
Der vorliegenden Erfindung lag daher die Aufgabe zugrunde, eine Einrichtung der eingangs genannten Art zuThe present invention was therefore based on the object of providing a device of the type mentioned at the beginning
schaffen, die die vorgenannten Nachteile nicht besitzt.create that does not have the aforementioned disadvantages.
s Diese Aufgabe wurde erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruches 1 gelöst. s This object was achieved according to the invention by the characterizing part of claim 1.
Bei der Erfindung wurde davon ausgegangen, daß der Wert des temperaturabhängigen Widerstandes bei gleicher Gasdichte und gleichbleibender bzw. kompensierter Umgebungstemperatur konstant bleibt und bei nachlassender Isoliergasdichte sich ändert. Die Widerstandsänderung wird durch die veränderte Wärmeleitfähigkeit des den temperaturabhängigen Widerstandes umgebenden Mediums hervorgerufen, z. B. wenn durch Fremdeinwirkung ein Leck in der Anlagenkapselung entsteht und Luft eintritt, die im Gegensatz zu SF, eine deutlich höhere Wärmeleitfähigkeit besitzt. Damit eine schaltanlagenfunktionsbedingte Temperaturänderung im zu überwachenden Gasmedium sich nicht auf das Meßergebnis auswirkt, ist es zweckmäßig, eine Kompensationseinrichtung vorzusehen.In the invention it was assumed that the value of the temperature-dependent resistance for the same gas density and constant or compensated ambient temperature remains constant and changes with decreasing insulating gas density. the The change in resistance is caused by the changed thermal conductivity of the medium surrounding the temperature-dependent resistance caused, e.g. B. if a leak occurs in the system encapsulation due to external influences and air enters, which in contrast to SF, has a significantly higher thermal conductivity. In order to a change in temperature in the gas medium to be monitored due to the function of the switchgear does not affect the measurement result, it is advisable to provide a compensation device.
Die mit der Erfindung erzielbaren Vorteile bestehen darin, daß die beweglichen Teile der bekannten Einrichtung und damit eine zeitraubende .Montage dieser Teile entfallen.The achievable with the invention are that the moving parts of the known device and thus a There is no need for time-consuming assembly of these parts.
EPO COPYEPO COPY
Die Prüfeinrichtung nach der Erfindung kann ohne weiteres als vorgefertigte Einheit in der Schaltanlage befestigt werden. Lediglich die elektrischen Verbindungen sind noch herzustellen. Weitere vorteilhafte Ausgestaltungen der Erfindung sind in der nachfolgenden Beschreibung eines Ausführungsbeispieles enthalten.The test device according to the invention can easily be attached as a prefabricated unit in the switchgear will. Only the electrical connections still need to be established. Further advantageous embodiments of the Invention are contained in the following description of an exemplary embodiment.
Die gemäß Fig. 1 als Prinzipskizze ausgeführte Zeichnung eines Ausführungsbeispieles zeigt den Abschnitt einer gasisolierten Schaltanlage im Schnitt.The drawing of an exemplary embodiment, executed as a schematic diagram in accordance with FIG. 1, shows the section of a gas-insulated one Switchgear in section.
Der von der Kapselung 1 eingeschlossene Raum ist mit Isoliergas, z. B. SF6 gefüllt. An Halterungen 3, die z. B. aus wärmefestem Isolierstoff hergestellt und auf einer Grundplatte 11 befestigt sind, ist der temperaturabhängige Widerstand 4, hier z.B. als Draht dargestellt, befestigt; an seinen Enden sind Zuleitungen 5 angeschlossen, die durch isolierte Durchführungen gasdicht durch die Kapselung geführt sind. Die Halterungen 3 bilden mit dem temperaturabhängigen Widerstand 4 und der Grundplatte eine vorgefertigte, z. B. an der Kapselungsinnenseite befestigte Montageeinheit.The enclosed by the encapsulation 1 space is with insulating gas, for. B. SF 6 filled. On brackets 3, the z. B. are made of heat-resistant insulating material and attached to a base plate 11, the temperature-dependent resistor 4, shown here as a wire, for example, is attached; At its ends, feed lines 5 are connected, which are led through insulated bushings in a gas-tight manner through the encapsulation. The brackets 3 form with the temperature-dependent resistor 4 and the base plate a prefabricated, z. B. mounting unit attached to the inside of the enclosure.
An die Zuleitungen 5 ist eine transportable Meß- und Anzeigeeinrichtung 6 anschließbar; dies geschieht vorzugsweise mittels Steckverbindungen 7.In der Meß- und Anzeigeeinrichtung ist eine Stromquelle, z. B. Batterie untergebracht, mit der die Erwärmung des temperaturabhängigen Widerstandes erzielt wird.A portable measuring and display device is attached to the supply lines 5 6 connectable; this is preferably done by means of plug connections 7. In the measuring and display device is a Power source, e.g. B. housed battery, with which the heating of the temperature-dependent resistor is achieved.
Die Zuleitung 12 eines Kompensationselementes 8, das den Einfluß einer möglichen Eigenerwärmung der Schaltanlage kompensiert, ist ebenfalls gasdicht und isoliert durch die Anlagenkapselung herausgeführt und mit der Meß- und Anzeigeeinrichtung steckbar verbunden.The feed line 12 of a compensation element 8, which compensates for the influence of possible self-heating of the switchgear, is also gas-tight and insulated through the system encapsulation and can be plugged into the measuring and display device tied together.
Die Auswertung und Umsetzung der Meßergebnisse in eine Digitalanzeige 1o, z. B. Luftanteil oder Isoliergasanteil in Prozent, wird durch eine hier nicht näher beschriebene elektronischeThe evaluation and implementation of the measurement results in a digital display 1o, e.g. B. The proportion of air or the proportion of insulating gas in percent is determined by an electronic device not described in detail here
Schaltung durchgeführt. rCircuit carried out. r
EPO COPYEPO COPY
Um die Zahl der notwendigen Dichtungen möglichst niedrig zu halten, kann alternativ zu dem gezeigten Ausführungsbeispiel auch eine Ausführung gewählt werden, die für sämtliche die Anlagenkapselung durchsetzenden Meßleitungen (5, 12) eine gemeinsame Durchführung vorsieht.In order to keep the number of necessary seals as low as possible, as an alternative to the exemplary embodiment shown, a design can also be selected that is suitable for all measuring lines penetrating the system encapsulation (5, 12) provides for a joint implementation.
% EPO COPY g % EPO COPY g
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843431376 DE3431376A1 (en) | 1984-08-25 | 1984-08-25 | Gas-insulated switching installation having a device for testing the density of the insulating gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843431376 DE3431376A1 (en) | 1984-08-25 | 1984-08-25 | Gas-insulated switching installation having a device for testing the density of the insulating gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3431376A1 true DE3431376A1 (en) | 1986-02-27 |
| DE3431376C2 DE3431376C2 (en) | 1991-04-18 |
Family
ID=6243933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19843431376 Granted DE3431376A1 (en) | 1984-08-25 | 1984-08-25 | Gas-insulated switching installation having a device for testing the density of the insulating gas |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3431376A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10229096A1 (en) * | 2002-06-25 | 2004-01-29 | Siemens Ag | Wear indicator for vacuum switch tube has wear indication parameters measured on inside of gas-tight encapsulation housing and indicated on outside of latter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2827406A1 (en) * | 1978-06-22 | 1980-01-10 | Driescher Spezialfab Fritz | Density indicator for encapsulated gas filled switch enclosure - uses float with counterbalancing spring visible through window |
-
1984
- 1984-08-25 DE DE19843431376 patent/DE3431376A1/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2827406A1 (en) * | 1978-06-22 | 1980-01-10 | Driescher Spezialfab Fritz | Density indicator for encapsulated gas filled switch enclosure - uses float with counterbalancing spring visible through window |
Non-Patent Citations (1)
| Title |
|---|
| J. Hengstenberg, u.a., Messen, Steuern und Regeln in der chemischen Technik, Bd. II, Springer-Verl., 1980, S. 95-104 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3431376C2 (en) | 1991-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |